<span style="color: #222222;">At least 70,000 people braved cold and rain in Brussels yesterday to demand the Belgian government and the European Union increase their efforts to fight climate change. The event has been described as Belgium's biggest climate march ever. </span><br />'' <br />'' <span style="color: #222222;">Trains from across the nation were so clogged that thousands of people did not make the march in time. Some 35,000 students in Belgium skipped classes on Thursday to take their demands for urgent action to prevent global warming. </span><br />''  <br />